Torque tool



Feb. 8,1949. R, BOQTH 2,461,491

TORQUEI' TOOL Fil e'd Aug. 27 '1946 IN V EN TOR.

Patented Feb. 8, 1949 TORQUE TOOL Ralph E. Booth, Mansfield, Mass., assignor to Apco Mossberg Company, a corporation of Massachusetts Application August 27, 1946, Serial No. 693,206

3 Claims. 1

This invention relates to a torque tool such for instance as a screw driver or wrench for supplying a certain force to a screw or nut.

It has heretofore been found in the use of torque tools that in certain positions of rotation of the tool it is exceedingly difiicult to read the dial which indicates the force applied inasmuch as the pointer or the dial turn and at some locations one or the other is in such a position that'it cannot be seen because of the obstruction of the hand of the operator or the handle of the tool. A ratchet has been at-' tempted to overcome this difficulty but the installation of a ratchet is expensive.

One of the objects of this invention is to provide an arrangement whereby the indicator of the torque tool may be visible at all times while the tool isin use.

Another object of this invention is to provide an arrangement so that the indicator may be installed in an inexpensive and simple manner.

Another object of this invention is to provide an indicator which will eliminate the use of mechanical operating parts.

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a perspective view of a torque tool equipped with this invention;

Fig. 2 is a sectional view on substantially, line 2-2 of Fig. 1;

Fig. 3 is a sectional view on line 33 of Fig. 2.

In proceeding with this invention, the tool which has two relatively rotating parts which are connected together by some elastic resilient means is equipped with a dial having a plurality of scales on one part, such for instance as the work engaging part and a plurality of a pointers on the other part, such for instance as the handle part. The arrangement is such that one scale and the pointer which cooperates therewith will always be in view regardless of h Lil A pair of blades or resilient members l5 are attached by means of the plug H and rivet I8 which extends through the plug and the blades and the handle or member it. These blades are such that they may twist but are of sufficiently elastic nature so that. they will return the handle to its normal position in which tension on the blades is released.

A dish shaped member 20 is provided with a collar 2! to receive the member Hi and be mounted fixedly thereon such as by means of a pin 22. A shell 23 of thin sheet stock carrying indicating scales 25, 25, 28 and 27 is fixedly secured in any suitable manner to this dish shaped member 2!] so as to remain securely fixed thereto.

A disc 28 having a collar 29 is mounted at the end of the handle member !4 and extends into the handle member to provide a bushing for rotation of the handle member 54 on the member it. This collar is fixed to the handle member in any suitable manner. Radially projecting from this disc 28 there are a plurality of pointers 29, 30, 3! and 32 as shown in the drawings so that each will cooperate with one of the scales 24-21, inclusive. Thus, the pointer 29 cooperates with the scale 24, pointer 30 with the scale 25, pointer 3! with thescale 26 and pointer 32 with the scale 2?.

By this arrangement as the handle is turned and resistance is encountered by the tool, flexing of the blades i5 will occur by reason of a relative rotation of the handle and the blade thus causing all of the pointers to move in unison over their scales and inasmuch as there are a plurality of scales, in this case, there being four selected to be shown, one of these pointers and its scale will always be in a position to be easily viewed by the operator. It will also prob ably occur that at least one of the pointers and scales will be in a position where it cannot be viewed by the operator. By this arrangement, a very simple construction is provided whereby viewing of the indication of the device is at all times visible.

I claim:

1. A torque tool comprising two relatively rotatable members, elastic resilient means resisting said relative rotation and serving to return said members to normal after relative rotation therefrom, an embracing dial carried by one of said members, a plurality of like scales P at different locations on said dial and a plurality of pointers comprising one for each scale fixed REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,052,023 Stevens Feb. 4, 1913 11,291,147 "Reynolds 'Jan. 14, 1919 "2,049,532 Williams Aug. 4, 1936 2,334,326 Hem Nov. 16, 1943 "2,394,022 Storrie Feb. 5, 1946 2;404,029 Birk July 16, 1946 2,429,450 Bunting Oct. 21, 1947 

